This does not mean that he considered the study of grammar and literature injurious to the Christian, or detrimental to his theological studies. His opinion on that subject is clear enough from all his writings and from his conduct as pictured in chaps. 18 and 19. Nor does it on the other hand imply, as Crusè supposes, that up to this time he had been teaching secular branches exclusively; but it means simply that the demands upon him for instruction in the faith were so great, now that the catechetical school had been officially entrusted to him by Demetrius, that he felt that he could no longer continue to teach secular literature as he had been doing, but must give up that part of his work, and devote himself exclusively to instruction in sacred things.